Making Machines That Make Others of Their Kind

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Science  16 Nov 2007:
Vol. 318, Issue 5853, pp. 1084-1085
DOI: 10.1126/science.318.5853.1084

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For decades, self-replicating robots have been a roboticist's dream--and a science-fiction writer's nightmare. Yet engineers haven't found a way to create 'bots that beget 'bots.